1. Reach the required standard hours of formal primary training in this occupation and obtain the graduation (completion) certificate.

2, engaged in this occupation for more than 2 years.

Second, intermediate (one of the following conditions)

1. After obtaining the primary vocational qualification certificate of this occupation, he has been engaged in this occupation for more than 3 years continuously, and has reached the required standard hours after the formal training of this occupation intermediate, and obtained the graduation (completion) certificate.

2. Having been engaged in this occupation for more than 4 years after obtaining the primary occupation qualification certificate of this occupation.

3, engaged in this occupation for more than 5 years.

(4) Obtain the vocational (professional) graduation certificate of the secondary vocational school recognized by the administrative department of labor and social security with intermediate skills as the training goal.

Three. Advanced (one of the following conditions)

1. After obtaining the intermediate vocational qualification certificate of this occupation, he has been engaged in this occupation for more than 3 years continuously, and has reached the required standard hours after the advanced formal training of this occupation, and has obtained the graduation (completion) certificate.

2. After obtaining the intermediate vocational qualification certificate of this occupation, he has been engaged in this occupation for more than 5 years continuously.

3, obtained by the administrative department of labor and social security audit, with advanced skills as the training goal of higher vocational schools this occupation (professional) graduation certificate.

4 college graduates who have obtained the intermediate vocational qualification certificate have been engaged in this occupation for more than 2 years.

5. Have been engaged in this occupation for more than 6 years continuously.

Extended data:

The task of a chemist:

1, use tools and equipment to collect samples;

2. Use equipment and tools to process and pretreat samples;

3. Prepare standard solution and chemical reagent by instrument;

4. Visually check the appearance of the sample;

5, the use of physical and chemical instruments, equipment, appliances, etc. To test the physical and chemical properties of the sample;

6. Operate chemical analysis and instrumental analysis equipment, carry out sample chemical analysis, colorimetric analysis, phase analysis, polarographic analysis, chromatographic analysis, spectral analysis, mass spectrometry analysis, atomic absorption spectrophotometry analysis and nuclear magnetic resonance analysis, and determine the content of sample components;

7. Record, calculate, judge and analyze test data;

8, inspection, debugging, maintenance of equipment, troubleshooting.